diff --git a/packages/component-user-manager/src/routes/collectionsUsers/get.js b/packages/component-user-manager/src/routes/collectionsUsers/get.js
index 3ef86406b0ae21590f2223d0b83c89c12bb9be2c..6bf9b5e5059f1b425c30ab998b3e5f86eb7c641a 100644
--- a/packages/component-user-manager/src/routes/collectionsUsers/get.js
+++ b/packages/component-user-manager/src/routes/collectionsUsers/get.js
@@ -6,6 +6,9 @@ module.exports = models => async (req, res) => {
   const { collectionId } = req.params
   try {
     const collection = await models.Collection.find(collectionId)
+    if (collection.authors === undefined) {
+      return res.status(200).json({})
+    }
     const members = await teamHelper.getTeamMembersByCollection(
       collectionId,
       'author',